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Beam generation and steering with integrated optical circuits for light detection and ranging

a technology of integrated optical circuits and beam generation, applied in the field of optical phased arrays, can solve the problems of high cost and cumbersome implementation of previous implementations, especially those using fiber based delay lines

Active Publication Date: 2012-11-13
UNIV OF WASHINGTON
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However previous implementations, particularly those using fiber based delay lines, have been extremely expensive and cumbersome.

Method used

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  • Beam generation and steering with integrated optical circuits for light detection and ranging
  • Beam generation and steering with integrated optical circuits for light detection and ranging
  • Beam generation and steering with integrated optical circuits for light detection and ranging

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Embodiment Construction

[0046]We now describe high index contrast waveguides that are useful to concentrate light in order to enhance nonlinear optical effects in various materials so that such effects can be employed to manipulate light (or more generally electromagnetic radiation) at low power levels, as compared to conventional systems and methods that employ nonlinear optical materials. The manipulation of electromagnetic radiation or light can be useful to provide a variety of components that perform operations on light such as rectification, modulation, filtering, and logic operations in a manner analogous to the same operations which are provided using electronic devices operating on electrical signals. For example, an input light wave to be processed is impressed onto the component. The light wave has at least one parameter characterizing the light wave, such as one of an intensity, a polarization, a frequency, a wavelength, and a duration (e.g., a pulse length, or in the case of continuous wave li...

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Abstract

An integrated photonic beam steering device includes a planar photonic substrate. An input waveguide is configured to accept an electromagnetic energy from a source of electromagnetic energy radiation. A first splitter is configured to split the electromagnetic radiation into one or more paths. One or more phased array rows are optically coupled to each of the one or more paths. Each phased array row includes a row splitter configured to split the each of the one or more paths into two or more row paths. Two or more phase modulators are each optically coupled respectively to each of the two or more row paths. Two or more output couplers are optically coupled respectively to each phase modulator output of the two or more phase modulators. The two or more output couplers are configured to radiate a steered photonic beam away from the integrated photonic beam steering device.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority to and the benefit of U.S. provisional patent application Ser. No. 61 / 084,508, filed Jul. 29, 2008, which application is incorporated herein by reference in its entirety.FIELD OF THE INVENTION[0002]The invention relates to optical phased arrays in general and more particularly to an optical phased array that employs planar integrated structures.BACKGROUND OF THE INVENTION[0003]LIDAR (Light Detection and Ranging) and LADAR (Laser Detection and Ranging) are methods used to image and characterize remote objects. LIDAR and LADAR are referred to interchangeably herein as “LIDAR”. In typical LIDAR applications, an electromagnetic beam in the optical domain or mid to near infrared domain (about 10-400 THz) is swept through the field of view of a detector.[0004]Electronic countermeasures are not LIDAR per se, but use some of the same concepts relating to beam steering. In some electronic countermeasures, a very st...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): G02B6/12G02B6/42G02B6/26
CPCG01S7/4814G01S17/42G02B6/12007G21K1/025G01S7/4813G02F1/2955
Inventor HOCHBERG, MICHAEL J.BAEHR-JONES, TOM
Owner UNIV OF WASHINGTON
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